JPS6053123B2 - Sheet for stabilizing the base of underwater structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an underwater structure that is installed at the base of an underwater structure such as a caisson, and that prevents the underwater structure from sinking or tilting due to scour of the underwater ground by water currents, waves, etc. Regarding the improvement of the base stabilization sheet for underwater structures, a steel pipe is attached to the free end of the flexible sheet body laid at the base of the underwater structure, and a concrete pile is attached to the base of the underwater structure through cables inserted into the steel pipe. The purpose of this is to have a simple structure, and to prevent the sheet from shaking due to waves or water currents at the free end of the sheet that protrudes from the base periphery of the underwater structure. An object of the present invention is to provide an improved sheet for stabilizing the base of an underwater structure, which prevents scouring of earth and sand at the lower part of the same end.

As described above, in the stabilizing sheet according to the present invention, the concrete pile is swingably connected to the steel pipe through the cable inserted through the steel pipe attached to the end of the flexible sheet main body. Therefore, when the sheet of the present invention is laid at the base of an underwater structure, the concrete pile at the end of the sheet that protrudes from the periphery of the base will be affected by its own weight and waves.
Due to the movement caused by the water flow, it is gradually buried in the sediment of the underwater bed, and is anchored in the same underwater bed. As a result, the free end of the sheet is held stable on the underwater ground. Therefore, the free end of the sheet protruding from the periphery of the base of the underwater structure is prevented from swinging due to water currents and waves, and the ground beneath the free end of the sheet is prevented from being scoured due to this swinging, thereby reducing the bearing capacity of the ground. Uneven subsidence of underwater structures due to uneven settling is prevented. When a heavy object is attached to the end of the sheet as an anchor, it is impossible for the anchor to be deeply buried in the soil of the underwater ground due to scour, and the intended purpose of the anchor cannot be fully achieved. However, in the present invention, the concrete pile as an anchor is connected to the steel pipe at the free end of the sheet body via a flexible cable, so the concrete pile can easily be immersed in the earth and sand of the underwater ground. It can be buried deeply and create an anchor effect.

In addition, at this time, since the connecting cables of the concrete pile are inserted and connected to the end steel pipes of the sheet body, when tension is applied to the cables as the concrete pile is buried, the free end of the sheet body parts are not sheared, etc.
The invention has many advantages. The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes a sheet body made of a vinyl chloride sheet or the like for stabilizing the base of an underwater structure. Steel pipes 2 arranged at a required interval are wound around the ends of the sheet body, and the wound ends 1a are wound around the ends of the sheets. A steel pipe 2 is attached to the free end of the seat body 1 by welding to the seat body 1. A concrete pile 3 is connected to the steel pipe 2 through a rope 4 made of polypropylene or the like.

The sheet for stabilizing the base of an underwater structure constructed as described above is laid at the base of an underwater structure A such as a caisson, and the sheet main body 1 protrudes from the periphery of the base of the structure A. The concrete pile 3 at the free end is buried and anchored in the earth and sand of the water bottom ground B due to its own weight and shaking due to waves and water current, and the free end of the sheet body 1 is held in a stable state on the water bottom ground B. It is something that

As a result, the free end of the sheet body 1 is prevented from swinging due to waves and water currents, and the inclination of the underwater structure A due to uneven settlement due to scouring of the earth and sand of the underwater ground B below the free end is prevented.
This is to prevent subsidence.

The present invention has been described below with reference to embodiments, but the present invention is of course not limited to these embodiments, and may be modified in various designs without departing from the spirit of the invention. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the sheet for stabilizing the base of an underwater structure according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view thereof, and Fig. 4 is a view showing its state of use. FIG. 1... Seat body, 2... Steel pipe, 3.
... Concrete pile, 4 ... Cable.

Claims (1)

[Claims] 1. A steel pipe is attached to the free end of the flexible sheet body laid at the base of the underwater structure, and a concrete pile is connected via a cable inserted into the steel pipe. Sheet for stabilizing the base of underwater structures.